Greasemonkey script to collapse Youtube suggestions behind a button that lets you toggle them

thing.js

// ==UserScript==
// @name     Collapse Youtube suggestions
// @version  1
// @grant    none
// @match    https://www.youtube.com/*
// ==/UserScript==

let attemptCounter = 0;
// For some reason we need to initially hide the element twice before it stops reappearing
let hideCounter = 0;

function initializePage() {
  const related = document.getElementById('related');
  if (hideCounter < 2) {
    if (related.style.display != 'none') {
      related.style.display = 'none';
      hideCounter++;
    }
    attemptCounter++;
    const timeoutMs = attemptCounter < 100 ? 100 : 750;
    setTimeout(initializePage, timeoutMs);
  } else {
    const btn = document.createElement('button');
    btn.className = 'yt-spec-button-shape-next yt-spec-button-shape-next--filled yt-spec-button-shape-next--mono yt-spec-button-shape-next--size-m';
    btn.textContent = "Show related videos";
    related.parentNode.insertBefore(btn, related);
    btn.onclick = () => {
      if (related.style.display === '') { // if displayed
        related.style.display = 'none';
        btn.textContent = 'Show related videos';
        btn.classList.remove('yt-spec-button-shape-next__button-text-content');
        btn.classList.add('yt-spec-button-shape-next--filled');
        btn.style.backgroundColor = "#000000";
      } else {
        related.style.display = '';
        btn.textContent = 'Hide related videos';
        btn.classList.add('yt-spec-button-shape-next__button-text-content');
        btn.classList.remove('yt-spec-button-shape-next--filled');
        btn.style.backgroundColor = "#99bbff";
      }
    }
  }
}

window.onload = initializePage;